Electrical engineering BLOG

It’s Good to have in mind practical aspects: case of a low voltage  switchboard To achieve the effective installation of the surge protection, the surge arrester’s connections to the grid should be as short as possible. Any cable crossed by a lightning impulse current has a significant voltage to be added to the Surge Protection Device (SPD) residual voltage.

nice picture from http://www.lafoudre.com/

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Lightning & Surge protection: Advice to ensure a  guaranteed lightning protection  for a low voltage electrical installation

lightning

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after 15 years of experience I feel important to come back to some basics

city lightning

Protection against the destructive  lightning effects should be considered globally.
To avoid the fire of a building we will use the “external”  lightning protection system such as lightning conductor or meshed cage.
In the same way, we will install Surge Arrester or surge protector (also called SPD, Surge Protective Device) in the Electrical main board to protect sensitive electrical equipment against surges generated by lightning strokes fell close or directly on the building.
15 years of experience in the field of surge protection lead me to write that the technology and understanding of phenomena has evolved. However, further issues have to be clarified … (more…)